You can also tell by the brightness of the dome light. Leave the door open, glow, and watch the dome light. If it does not dim, the relay could be having problems, unless two or more GP's are burned out.

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

99 W210 E300 TD Turbo, chipped. Still needs EGR Delete, 228K

90 Dodge D250 5.9 Cummins/5 speed. 400K